Cut-off or nail-checking attachment for nailing machines



J. KARSKY ET AL CUT OFF OR NAIL CHECKING ATTACHMENT FOR NAILING MACHINES Filed June 12, 1922 a w W? Patented July 22, 1924.

UNHED STATES JOSEPH KARSKY AND HERMAN MEYER, or new CLAIRE, WISCONSIN.

GUT-OFF OR NAIL-CHECKING ATTACHMENT FOR NAILING MACHINES.

Application filed June 12, 1922. Serial No. 567,711.

T 0 all whom it may concern:

Be it known that we, JOSEPH KARsKY and HERMAN MEYER, citizens of the United States, residing at Eau Claire, in the county of Eau Claire and State of Wisconsin, have invented certain new and useful Improve ments in Cut-Off or Nail-Checking Attachments for Nailing Machines, of which the following is a specification, reference being had to the accompanying drawings.

It is the purpose of the present invention to provide a device of this character for feeding nails one at a time into the nailing chuck, and as each nail is fed means is afforded for checking the remaining supply of nails.

Another purpose is to provide an attachment including a slide with plates thereon and adapted for sliding movement back and forth as the plunger drives a nail, thus droppingand feeding another nail into the chuck. i

A still further purpose is to provide an attachment of this kind, which is simple, efficient and practicalin construction, and can be easily applied to a conventional form of nailing machine, wherein a reciprocating slide operates an oscillatory arm or lever, which upon its return movement caused by the tension of the spring the slide of the nail cut oil or checking attachment is, moved, causing it to drop another nail into the chuck to be driven.

It is to be understood that the particulars herein given are in no way limitative and that while still keeping within the scope of the invention, any desired modifications of detail and desired proportions may be made in the apparatus according to circumstances.

The invention comprises further features and combination of parts, as will be hereinafter set forth, shown in the drawings and claimed.

In the drawings Figure 1 is a view showing, the improved cut off or checking attachment as applied to a nailing machine, showing, its connection with an oscillatory arm, which is'actuated by a reciprocating slide;

Figure 2 is a side view of thesame showing the oscillatory arm as connected to the slide i Figure3 is a plan view showing the trough or channel for the nails and illustrating the slide which feeds the nails one at a time into the chuck;

Figure 4 is a sectional view on line H of Figure 3;

Figure 5 is a sectional'view on line 5.5 of Figure4;

Figure 6 is a sectional view on line 6'6 of Figure 4;

Figure 7 is an enlarged sectional view similar to the right hand sectioned portion of Figure 4., showing the tube which leads to the chuck.

Referring to, the drawings, 1 designates a portion of a nailing machine including a reciprocating slide 2, which may be operated by any suitable means (not shown), but constituting a part of the nailing machine. An oscillatory arm 3 is pivotally mounted upon the frame. of the machine, and its upperfend is provided with a lateral fork 4., The lower end of the arm 3 is in. the path of the slide 2, so that as the slide reciprocates the arm 3 is oscillated upon its pivot, moving the upper end of the arm back and forth. In fact the upper end of the arm 3 moves in one directionbytheaction of the slide 2, and receives a reverse movement through the action or the tension of a spring 5, which is attached to the upper end of the arm at one end, and to a projection of the machine vat the other end.

The cut off and checking attachment for the nails comprises a plate 6 which is fas-. tened to the frame of the machine for holding the attachment in position. Theupper portion of the plate has a lateral flange 8, which is provided with 'a slot 9 and an arouate opening'10. The opening 10 merges into a slotll, which is formed in the vertical portion of the plate, 6. The plate .6 is pro vided with slots 12, to, receive the bolts 13, which actlto fastenan angular plate 14 to the plate 6 adjustably' Inaother words by loosening the nuts upon the bolts 13,. the angular plate 14 may be adjusted relatively to the plate 6, thereby adjusting the guides for the nails. 2

The vertical portion of the angular plate 14; is provided with a slot 15 which extends through the substantially horizontal portion, In other words the slot 15 is open atone end, thereby causingto be formed substan tially horizontal projections 16. The op posed guides 17 for the nails are attached to are prov ed wit re ss s 2 the projections 16 (which have slots) by means of bolts 18. These bolts 18 pass through the slots 19 of the projections, thereby enabling the guides 17 to be ad j'usted toward and from each other. In fact the bolts 13 may be loosened and the two guides adjusted at the'same time, when adjusting the plate 1 1 with relation to the plate 6.

The guides 17 consist of heavy metal strips, the corresponding ends 19 of which In other words these recesses .or grooves extend in a horizontal'direction, and are engaged by the stationary and adjustable blades 21 and 22, which are carried by the reciprocating slide 23 of the cut off and checking attachment. In fact the stationary blade 21 is riveted or otherwise fastened at 24 to the slide 23, while the blade 22 is fastened by means of a bolt 25 to the slide 23. It will be noted that the blade 22 can be adjusted not only pivotally, but also longitudinally upon the slide 23, due to the provision of a slot 26 formed therein. Each edge portion of the blades 21 and 22 which engage the. grooves or slots 20 overlie one edge of the slide 23, in order to engage the grooves. The slide 23 has a U-shaped opening or recess 127, which corresponds to and registers with the opening 10, that is when the slide isin a position such that the checking or cuttingfoff end 28 of the blade 21 is in the path of the passage of the nails. However when the slide 23 is moved in the direction of the arrow a, the opening 27 moves out of registration with the opening 10. The projecting end 28 of the blade 21 .extends sufliciently across the passage of the opening 27, so as to cut off the passage of a nailinto the opening. Furthermore the blade 21 has an angularly arranged edge, which merges to the point or end 28 and acts to cam or feed a nail into the openings lOand 27, so as to permit a nail at a timeto drop into the chuck (not shown) of the nailing machine. The guides 17 are arranged adjacent each other, so that the edges are spaced from each other to provide a guide for the series of nails. In fact the space between the'adjacent edges of the two guides 17 may be considered as a trough or channel for the nails. In order that the cam or-inclined edge will act to feed a nail at a'time into the opening 27, one edge of the blade 21 overlies one edge of. the slide I 23 considerably morethan the correspond,

ing edge of the blade22. In other words the adjacent ends of the blades 21 and 22 into the openings 10 and 27. The nut 29 onthe bolt which fastens the blade 22 to the slide 23 operates .in the slot 9 0f the flange v80f theplate 6, thereby acting to ing ear or lug 31 whichis engaged by a lateral end 32 of the oscillatory arm 3, so

that when the arm 3 is oscillated in the direction of the arrow 6, the projecting end of the blade 21 will move 'across'the chute, guide or channel between the two guides 17 thereby feeding a nail in the openings 10 and 27 Located with its upper end adjacent the lateral flange 8 of the plate 6 is a tube 6*, which is in registration with i the openings 10 and 27 to receive the nails from the openings, for the purpose of conveying them to a suitable nail chuck (not shown), where the nails are driven. The tube 6 may be fastened'in position in any suitable manner (not shown). When the slide 23 moves in the opposite direction, the projecting tapered end will move from across the slot between the two'guides 17, and thereby permit another nail to enter. The projecting end of the blade 21 acts to check or cut off the remaining supply of nails. The ends 33 of. the guides 17 are held in relative positions by means of the feet 35 thereof are secured by bolts 34cto the guides 17. This bracket holds the guides in spaced relative positions, in order to receive the nails, which pass through the space between the guides. The nails are fed from a suitable hopper or box (not shown), in the space between the guides 17. This improved cut off or nail checking attachment is regular in its action, and will feed one nail at a time, and no more to the chuck (not shown) through the medium of the tube 6.

The invention having been set forth, what is claimed is:- V

1. Ina nailing machine, a frame, a nail chute, a support provided with a guide and an opening leading to the chute, a slide 0perable' in said guide and having an opening registrable with the opening in the sup port, aud a pair of plates carried by the slide and movable therewith transversely of the chute, said plates being arrangedin somewhat staggered relation and having their corners most remote from the chute diagonally cut away to define points arranged out of alignment, one plate being stationary and the other adjustable.

2. In a nailing -machine, a supporting plate formed with a guide and having an opening communicating with a nail tube, an angular bracket secured to the plate and formed with a bifurcation, bars arranged in spaced relation and secured upon said angular plateto constitute a nail chute lead- 'U-shaped bracket 35; the lateral flanges or ing to said opening, a slide mounted for reciprocation upon the support and having an opening adapted to register With the chute and the tube, and a pair of plates secured upon the slide and having their corners most remote from the chute diagonally cut away to be in non-obstructing relation to the opening in the slide and to define a point and a cam edge on one plate, said point being out of alignment with the cor- 10;

responding point of the other plate to act as a check for holding back the nails in the chute, said inclined edge camming the nails into said opening in the slide.

In testimony whereof we hereunto aflix 15 our signatures.

JOSEPH KARSKY.. HERMAN MEYER. 

